San Francisco City property record for 643 18th Ave, San Francisco, CA 94121
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 2,650 sqft · built 1920 |
| Lot Size | 0.001 acres (30 sqft) |
| Owner | Individual Name on File |
| Last Sale | $167,000 (May 2004) |
| Tax Bill | $6,545 (2025) |
| APN | 1626-003A |
| Primary APN | 1626-003A |
|---|
| Full Baths | 1 Bath |
|---|---|
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 2,650 sqft Living Area |
| 1st Floor Area | 2,650 sqft |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 1920 |
| Construction Type | Frame |
| Lot Area | 30 sqft (0.001 acres) |
| Street Address | 643 18TH AVE |
|---|---|
| City | SAN FRANCISCO |
| State | CA |
| Zip | 94121-3822 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RH2 |
| Legal Subdivision | OUTSIDE LAND BL 363 |
| Legal Block | 1626 |
| Legal Lot Number | 3A |
| Jurisdiction | SAN FRANCISCO CA |
| Township / Civil Division | RICHMOND-PRESIDIO-MARINA |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 47600 |
643 18th Ave is owned and occupied by an individual who acquired it in November 2016.
Source: San Francisco City records, as of September 8, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 643 18TH AVE, SAN FRANCISCO, CA 94121-3822 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 28, 2004 · Amount on File |
| Deed Sale | May 28, 2004 · Amount on File |
| Deed Document Number | 2004730370 |
| Deed Book / Page | 648 / 262 |
| Last Transfer Date | Nov 10, 2016 |
| Transfer Doc | K363180 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 643 18th Ave was $6,545 with a homeowner's exemption, up 2.9% from the year before.
Source: San Francisco City assessment roll, as of September 8, 2026
| Type | Name |
|---|---|
| State | California |
| County / Municipality | San Francisco City |
| Unified School District | San Francisco Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $502,049 (+2.01%) Land $272,487 Building $229,562 | |
| 2025 | $6,545.00 (+2.92%) Homeowner's exemption | $492,138 Land $267,111 Building $225,027 |
| 2024 | $6,359.00 (+1.68%) | |
| 2023 | $6,254.00 (+2.17%) Homeowner's exemption | $473,030 Land $256,740 Building $216,290 |
| 2022 | $6,121.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA has no flood map on file for 643 18th Ave.
Source: FEMA National Flood Hazard Layer
| FEMA Flood Zone | Not on file |
|---|
Values are read at the parcel center point; lenders make the official flood determination.
The area around 643 18th Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | SFPUC CITY DISTRIBUTION DIVISION serves 848,019 people · EPA ID CA3810011 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Mar 2023 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 1,399 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
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